251 results found.
Year: 2010, Volume: 10, Issue: 1
... effectiveness of the in AC/DC/AC applications, especially AC motor drives [8, proposed method in providing precise power control with minimum distortion and harmonic noises (THDi), and at the 9] are reported. Some other works successfully employed same time, low distortion in active and reactive powers. this ...
Terms matched: 1 - Score: 10 - 450k
Year: 2010, Volume: 10, Issue: 4
... since such environment seems to the highest signal-to-noise ratio (SNR) (or equivalently, be the most realistic in microcellular radio communications with the strongest signal assuming equal noise power among systems. The performance analysis includes the channel correlation effect since in practice diversity is usually the antennas) is connected to the output. Efficient cellular ...
Terms matched: 1 - Score: 10 - 2,002k
Year: 2018, Volume: 18, Number: 3
... motor type, such as electromagnetic torque ripple, and consequently by high the number of rotor teeth and phases, then for a specific- level of vibrations and noise as well [1, 2]. The amplitude of design motor with a fixed number of rotor teeth and stator the electromagnetic torque oscillations is influenced by ...
Terms matched: 1 - Score: 10 - 1,379k
Year: 2015, Volume: 15, Number: 1
... variables. The based on successive interference cancellation and needs to signal is corrupted by i.i.d zero mean additive white calculate the pseudo-inverse of the channel matrix and its Gaussian noise [13, 14]. Block diagram of MIMO-OFDM deflated matrices [5, 6]. Integrating OFDM and MIMO system for one subcarrier k, where ...
Terms matched: 1 - Score: 10 - 627k
Year: 2015, Volume: 15, Number: 2
... filtering with modulated excitation signals is proven to offer the where k is a gain factor and d is the physical realisation advantage of identifying signals in the presence of noise [1 ], generated time shift. while displaying a filtering gain proportional to the For the input s(t ), the matched filter output is ...
Terms matched: 1 - Score: 9 - 1,187k
Year: 2010, Volume: 10, Issue: 3
... to to the PWM modulator were eliminated. Besides, a low-pass emulate the magnetic operating conditions of a DC motor, filter was implemented to reduce the harmonics and noise in the information regarding the rotor status is required to the PMSM. perform the field orientation process of the flux-vector The proposed system includes a flux estimator which ...
Terms matched: 1 - Score: 9 - 883k
Year: 2015, Volume: 15, Number: 1
... reduced DC bus voltage) at the reflected in the harmonic losses reduction as well as the beginning of the experiment, after which the torque reduction of the acoustic noise level. The proposed reference is released. It is clearly noticeable that the algorithm enables also the retention of good dynamic proposed algorithm with the multilevel hysteresis gives ...
Terms matched: 1 - Score: 9 - 2,542k
Year: 2013, Volume: 13, Number: 3
... PMSM operation, such as: mechanical vibrations that may constructions being already proposed in [27], [28]. reduce the machine bearings lifetime, acoustic noise, However, compared to the slotted counterparts, the slotless positioning errors in case of precision systems, [13] -[ 15] etc. PMSMs ...
Terms matched: 1 - Score: 9 - 885k
Year: 2018, Volume: 18, Number: 1
... the performances of the oscillators [15-17]. Thus, the newly II. DESIGN OF THE ACTIVE FREQUENCY STABILIZATION developed oscillators showed better linearity, enhanced OSCILLATOR phase noise performances, lower harmonics, and better Among the oscillators presented in Table I [3 ], the thermal stability. In [18], the BST ...
Terms matched: 1 - Score: 9 - 1,716k
Year: 2010, Volume: 10, Issue: 4
... cross- Control of the director magnetic field in ion trap of section and the number of turns. The sensitivity and the the maser for atomic clock signal/noise ratio depend on the quantity of material- Magnetic field control at the MAT 252 Finnigan (copper) the coil is made of, and the conductor diameter ...
Terms matched: 1 - Score: 9 - 9,652k